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J. EPPLBY- PURNAGE. 4No. 348,116. Patented Aug-24 1886.

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PURNAGB, 4 No. 348,1'16. Patented'Aug. 24, 1886.

NITED STATI-3s PATENT rricn.

FURNACE.

SPECIFICATION forming part o f Letters Patent No. 348,116, dated August 24, 1886.

Application filed May 19, 1884.

T 0 @ZZ whom it may concern.-

Be it known that I, JOHN EPPLEY, acitizen ofthe United States, residing at York, in the county of York and State of Pennsylvania, haveinvented certain new and useful Improvements in Furnaces, of which the following isa specification.

My invention relates to improvements in hot-air furnaces, and has for its object to construct a furnace with great heating capacity in proportion to the amount of fuel consumed, and which may be used as yan ordinary furnace,or easily converted into a portable heating-stove.

The invention consists in the general construction of the furnace to produce the greatest possible amount of heat with the least con-l sumption of fuel, as described hereinafter,and illustrated in the accompanying drawings, in which- Figure l is a central vertical section of a furnace embodying my improvements. Fig. 2 is a side view, the outer casing removed. Fig. 3 is a plan View thereof with the top removed. Fig. 4 is a front elevation of the furnace converted into a port-able heater; and Fig. 5 is a plan View of the base used in the form of heater shown in Fig. 4.

A represents the outer wall of the furnace, it consisting of two concentrically-arranged casings, between which is asbestus, mineral wool, or other non-conducting material. rIhe casing has a top, H, from Which extend the hot-air pipes I. p

Inolosed in the casing Ais the heater proper, which consists, essentially, of a base, B, cylinders C, D, and E, reverberatory dome K, and circular casing G, these parts being generally arranged as clearly shown in Fig. 1, and hereinafter particularly described. The front portion of the base Bis elongated, as shown in Fig. 2, to form a neck, P, which extends through the outer wallof the furnace, and through which the interior of the ash-pit in the base may be reached.

Supported on suitable bearings in the base B above the ash-pit is a grate, L, of usual construction, and at the upper` edge of the base is a liange or ring, b, above a shoulder, a, on which rests the cylinder C, constituting the fire-pot of the furnace.

Resting on the upper edge of the cylinder Serial No. 1Zll,986. (No model.)

O, and secured thereto in any suitable manner or forming part thereof, is an outwardly projecting and inclined plate c, the outer edge of which is turned up to form a flange, Within which rests the cylinder D, constituting the outer wall of the combustion-chamber.

Inside ofthe cylinder D is arranged the cylinder E,Which is much smallerin diameter than the former, to forman intervening chamber,Y, and is supported therein on a plate, e, which extends to the edge of the dome and is similar in form `to the plate c.

Through the plates c and e, and directly through the fire-pot, extend pipes g, the lower ends of which may project through the lower plate, c. These pipes constitute conduits for the admission of cold air from the outside of the fire-pot to the interior of the cylinder E.

On the upper edges of the cylinders D E rests a circular perforated plate, t', constituting the top of the chamber Y,whioh communicates with a supplemental chamber, X, in the casing the combustion-chamber between the cylinders D E, through the pipes k, and into the supplemental chamber X, where they are collected and directed through the outlet-pipe Z to the line.

The cold airis admitted to the furnace i through openings t in the outer Wall, A, near the bottom thereof, and passes upward into the pipes g, which conduct it directly through the fire-pot and into the heating-chamber M, where it is exposed to the heated sides of the Adome K and cylinder E and ascends to the top of the furnace, from where it is distributed through the pipes I to the apartments to be heated. It will be seen that by this construction the parts of the furnace are all thoroughly exposed to the direct action of the tire and become thoroughly heated, and that the cold air from the openings t is caused to pass into intimate contact with the highly-heated sur- `faces and takes up the heat rapidly and es- IOO capes freely. Theouter wall or casing, A, is made of metallicplates, as shown, and is divided vertically into a number of sections, p, all of which are provided at the edges with flanges y, by which the several sections may be bolted together. By thus dividing the outer casing, A,into vertical sections any particular section may be removed without disturbing the rest, and thus all parts of the furnace proper may be easily reached for any purpose without disturbing the air-pipes I. At the upper ends of the sections p are provided ears q, to which the cover H may be bolted and heldin place above the furnace.

In one of the sections p of the casing A are two openings, one of which is adapted to receive the neck P of the base B, and the other opening is arranged to receive a neck, T, extending from the side of the cylinder D, and through which the fuel is fed into the fire-pot. These openings are closed by suitable doors.

It is sometimes desirable to use the furnace as a portable heater, and to make it available for this purpose theouter casing, A, is removed and the form of base shown in Figs. 4 and 5 may be used. In this instance the base B is of circular form and provided on its under side with suit-able openings outside of the ash-pit af, through which the cold air is admitted to the heater. The upper plate, w, of the base is provided with a series of openings having collars v, into which fit the lower ends of an additional set of pipes, o. The upper ends of the pipes o fit into the downwardly-projecting ends of the fues gin the plate c. By this arrangement a direct connection between the base and furnace is effected, and the furnace thus adapted for use as an ordinary stove without otherwise altering the construction of its parts, so that it may be easily employed for either purpose.

Instead of llling the space between the walls of the outer casing with asbestus, the said casing may have upper and lower openings whereby to permit a current of cold air to act asthe non-conductor.

I claim- 1. The combination of -thc outer sectional non-conducting casing, A, the inner cylindrical casings, D E, and central dome, K, extending above said casings D E, the latter casings and dome being connected to form an airchamber, M, and gas-chamber Y, as described, the fire-pot C, having at its upper extremity a fiange, and air-pipes g, extending through said flange and communicating with the chamber M, substantially as described.

2. The combination of the outer sectional non-conducting casing, A, the inner cylindrical casings, D E, and central dome, K, extending above said casings D E, the latter casings and dome being connected to form an airchamber, M, and gas-chamberY, as described, the fire-pot C, having at its upper extremity atlange, air-pipes g, extending through said flange and communicating with the chamber M, and an independent annular casing snrrounding the dome above the chamber Y, and communicating with the latter and with the chimney, ysubstantially as described.

3. The combination, in a furnace, of the base composed of hanged sections B C, outwardlyextending iiange c, supported at and withiu JOHN EPPLEY.

Witnesses:

G. WASHINGTON LoUoKs, GEORGE B. KRABER. 

